. >>> tunisia's first post-arab spring prime minister has announced his resignation. he is stepping town after his party refused to back his plan for a cabinet of independent technocrats. >> translator: i promised that if my initiative did not succeed i would step down as prime minister. this is what i did a short time ago when i met the president of the republic. >> he was trying to form a nonpartisan government to quell public protests. tunisians have been demonstrating since the assassination of an opposition leader earlier this month. members of the ruling party have to pick a new prime minister but night not find it easy. >>> analysts at a u.s. cyber security firm are accusing the chinese military of spying on american corporations. they say one unit stole information from more than 100 companies. officials in the obama administration have their own concerns. analysts at virginia based firm released a report identifying the people's liberation army. they say members of one unit have attacked more than 140 organizations over the past seven years. they believe the